<span> "B. Empty space around the nucleus"
because of this empty space, most radiated particles can pass </span>straight through, while the others get propelled in different directions.
The awnser is A :)
****************************
Answer:
10
Explanation:
The 5 will multiply the subscript 2 on the K atoms making it 10
A chemical change occurs when the identity of a substance is changed. Silver tarnishing is a chemical change because silver and sulfur react to form a new substance, silver sulfide. In the other examples, the substances have not changed their identity and only physical changes have occurred. the correct answer is D
Answer: (1) The first ionization energy decreases and the electronegativity decreases
Explanation:
When we move from top to bottom in a periodic table the atomic size of elements increases and it becomes easy to remove valence electron from the elements at low energy.Thus decrease in ionisation energy from top to bottom.
Metallic character increases as we move down into a group of a periodic table and metals have low electronegativity than non-metals. So, value of electronegativity decreases from top to bottom.
